Determine the number of significant figures (digits) in each of the following:

#1:   12.53

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2
3
4
5


 #2:    8702

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2
3
4
5


#3:    0.0084

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2
3
4
5


#4:    89,000

1
2
3
4
5


#5:    89.000

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2
3
4
5


#6:   1.230

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2
3
4
5


#7:    9,000

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2
3
4
5


#8:    7020

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2
3
4
5


#9:    0.0001

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2
3
4
5


#10:   5.2 x 102

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2
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5


#11:    70,001

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2
3
4
5


#12:    0.0250

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5


#13:    1.00 x 10-4

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5


#14:    250,000,000

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2
3
4
5


#15:     90,020

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5